Diagnostic test device



FIG. 1 is a front perspective view of a diagnostic test device;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines in FIG. 2 are included for the purpose of illustrating a portion of the diagnostic test device that forms no part of the claimed design. 

The ornamental design for a diagnostic testing device, as shown and described. 